ar X iv : h ep - p h / 98 11 46 1 v 1 2 4 N ov 1 99 8 GUTPA / 98 / 10 / 4 The Problem of the Quark - Lepton Mass Spectrum

ar X iv : h ep - p h / 98 11 36 4 v 1 1 7 N ov 1 99 8 Quark Propagation in a Quark - Gluon Plasma with Gluon Condensate ∗

We present a calculation of the thermal quark propagator taking the gluon condensate above the critical temperature into account. The quark dispersion relation following from this propagator, describing two massive modes, is discussed. PACS numbers: 12.38.Mh, 14.65.-q, 12.38.Lg Typeset using REVTEX Supported by DFG Permanent address: Institut für Theoretische Physik, Universität Giessen, 35392 ...

ar X iv : h ep - p h / 98 10 38 8 v 1 1 6 O ct 1 99 8 Agut Masses

From considerations of the number of matrix elements of different orders of magnitude in the quark and charged lepton mass matrices, we suggest that the underlying gauge group responsible for the spectrum should have several— actually of the order of 7 to 10—cross product factors. This is taken to support our AGUT gauge group SM G 3 × U (1) f which, under certain simple conditions, is the maxim...

ar X iv : h ep - p h / 98 05 46 8 v 1 2 6 M ay 1 99 8 COURSE HEAVY QUARK PHYSICS

ar X iv : h ep - p h / 98 07 50 9 v 2 1 7 N ov 1 99 8 Systematics of single superpartners production at leptonic colliders ∗

We examine the effects of the lepton number violating R parity odd superpotential, W = λ ijk LiLjE c k , on single production of fermion (charginos and neutralinos) and scalar (sleptons and sneutrinos) super-partners at leptonic colliders for center of mass energies up to 500GeV − 1T eV. The probability amplitudes for all the five 2 → 2 body processes: l

ar X iv : h ep - p h / 98 05 23 2 v 1 6 M ay 1 99 8 Mass Corrections to the Tau Decay Rate

In this note radiative corrections to the total hadronic decay rate of the τ-lepton are studied employing perturbative QCD and the operator product expansion. We calculate quadratic quark mass corrections to the decay rate ration R τ to the order O(α 2 s m 2) and find that they contribute appreciably to the Cabbibo supressed decay modes of the τ-lepton. We also discuss corrections of mass dimen...